I am satisfied with the product, but since it is often used in large quantities, if you can lower the unit price by packing it into 10 packs etc. and making it simple packaging, the satisfaction level is still Increase.

Since the filament of the 3D printer was hooked on the stick, there was some resistance in the drawer, so I put this bearing in the shaft. The load to the retracting gear decreased because it became very light to take out the filament.